Screen printed of mask printed microwave absorbing material on module lids to suppress EMI
US5324887A · kind A · utility
3Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Jun 26, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q17/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An absorber for a microwave module and method of fabrication thereof wherein an ink is provided from a mixture of powdered iron and a resin. The ink is then screen printed or mask printed onto the interior surface of the lid of the microwave module in a predetermined pattern to lower the Q of the cavities within the module. The lowered Q suppresses the electromagnetic resonance and thereby minimizes the EMI problems. Furthermore, the absorber material reduces EMI between sections of the module at frequencies where no cavity resonances occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.